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CVE-2001-0006

HighPublished

The Winsock2ProtocolCatalogMutex mutex in Windows NT 4.0 has inappropriate Everyone/Full Control permissions, which allows local users to modify the...

Published: May 7, 2001
Updated: Dec 3, 2024
Assigning CNA: mitre
Evidence observed: Jan 24, 2001

Primary CVSS

7.1/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS probability estimate

3.0%

Low · next 30 days

Percentile: 86.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The Winsock2ProtocolCatalogMutex mutex in Windows NT 4.0 has inappropriate Everyone/Full Control permissions, which allows local users to modify the permissions to "No Access" and disable Winsock network connectivity to cause a denial of service, aka the "Winsock Mutex" vulnerability.

Sources

Microsoft Windows NT 4.0 - Networking Mutex Denial of ServiceExploit
Arne Vidstrom · windows · Jan 24, 2001

Responsible use

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